Garage door torsion springs
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How to Measure your Springs
This method of measuring your torsion springs requires you to measure the existing springs. Use this method if the door worked correctly before the spring(s) broke and the garage door has not been tampered with. To measure the torsion springs, follow each of the following steps carefully. If the garage door has two springs measure each spring individually. It is not uncommon to have two different size springs. If you would like to convert to a matching set, no problem! contact us and we'll get you fixed up.
WARNING: Torsion springs, extension springs, and other garage door hardware can cause serious injury or death if not handled and installed properly. Professional installation is recommended. Do NOT attempt to install springs or hardware yourself unless you have the proper tools, reasonable mechanical aptitude, experience, and upper arm strength. Read and understand all instructions before any work is done. Extension and torsion springs, along with attached hardware, are under extreme tension at all times. All tension must be released from springs before any work is performed.
Step 1 Determine Wire size
The wire size of your spring will be the thickness of the coil itself. The most efficient way to measure the wire size is to measure 10 coils and then measure 20 coils and compare the measurements to the chart below. Measure to the nearest 1/16" of an inch. It is important to make sure there are no gaps between the coils. Measuring coils that have gaps will give incorrect measurements. It is very important to order exactly the size you have. Going up or down even one wire size will cause the door to not operate correctly.
Step 2 Determine Inside diameter (ID)
For your broken spring(s) measure the inside diameter of the spring. If the spring is in one piece you can find the diameter on the cones, p175=1 3/4" and p200=2". Typically residential springs will have a 1 3/4" or 2" inside diameter.
Step 3 Determine Spring length
For this step we will be measuring just the coils themselves, not including the end cones. When measuring your torsion spring, remember that in order to get a proper measurement the spring must be un-wound. If the spring is in two parts, unscrew the set screws and connect the spring ends together to get a total measurement. Do not include the cones in the measurement. The length will need to be to the nearest whole inch. If you happen to get a half inch measurement it is okay to round up.
Step 4 Determine Spring wind
standard residential torsion systems will have either a pair of torsion springs, or just a single. if the spring is located on the Left side of center looking at the door from the inside of the garage, it is a right hand wound (RHW) spring. the spring on the right side will be left hand wound (LHW). If there is a pair of springs and only one spring is broken we highly recommend replacing both springs as they trend to break around the same time.
